Liquid crystal display panel and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-10295871-B2
Application number	US-201715413626-A
Country	US
Kind code	B2
Filing date	Jan 24, 2017
Priority date	Sep 29, 2016
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

A liquid crystal display panel and a liquid crystal display device are provided. The liquid crystal display panel comprises a first substrate, a second substrate, a liquid crystal layer sandwiched between the first and second substrate, and an auxiliary electrode. The first substrate includes a plurality of gate electrode lines and a plurality of data lines intersected to define a plurality of pixel units. Each pixel unit corresponds to a pixel electrode and a common electrode. In each region corresponding to one pixel unit, the pixel electrode and the common electrode are configured to form an electric field that drives the liquid crystal layer. A vertical projection of the auxiliary electrode on the first substrate covers an area where the electric field is formed by the pixel electrode and the common electrode, and a thickness of the liquid crystal layer is less than or equal to 3.2 μm.

First claim

What is claimed is:

1. A liquid crystal display panel, comprising:
a first substrate;
a second substrate arranged opposite to the first substrate;
a liquid crystal layer sandwiched between the first substrate and the second substrate; and
an auxiliary electrode disposed on one side of the liquid crystal layer facing away the first substrate and coupled to a reference voltage,
wherein:
the first substrate includes a plurality of gate electrode lines, a plurality of data lines, the plurality of gate electrode lines intersecting the plurality of data lines to define a plurality of pixel units, a plurality of pixel electrodes and a plurality of common electrodes being insulated from the plurality of pixel electrodes,
the second substrate includes a base substrate and a black matrix layer disposed on one side of the base substrate facing towards the liquid crystal layer, and the auxiliary electrode is sandwiched between the black matrix layer and the base substrate,
in each region corresponding to one pixel unit, a pixel electrode and a common electrode are configured to form an electric field that drives the liquid crystal layer,
a vertical projection of the auxiliary electrode on the first substrate covers an area where the electric field is formed by the pixel electrode and the common electrode,
the auxiliary electrode is electrically connected to the common electrode through a golden ball, a vertical projection of the golden ball on the first substrate non-overlapping with the pixel electrode, and
a thickness of the liquid crystal layer is less than or equal to 3.2 μm.

2. The liquid crystal display panel according to claim 1 , wherein:
the first substrate is an array substrate; and
the second substrate is a color film substrate.

3. The liquid crystal display panel according to claim 2 , wherein:
the pixel electrode and the common electrode are disposed on a same layer; and
in each region corresponding to the one pixel unit, a space pattern of the electric field is formed between the pixel electrode and the common electrode, and the vertical projection of the auxiliary electrode on the array substrate covers the space pattern.

4. The liquid crystal display panel according to claim 2 , wherein:
the pixel electrode is disposed on one side of the common electrode facing towards the liquid crystal layer;
in each region corresponding to the one pixel unit, the pixel electrode forms a driving electrode pattern, a vertical projection of the common electrode on the pixel electrode covers the driving electrode pattern, and the vertical projection of the auxiliary electrode on the array substrate covers the driving electrode pattern.

5. The liquid crystal display panel according to claim 1 , wherein:
the pixel electrode is disposed on one side of the common electrode facing away the liquid crystal layer; and
in each region corresponding to the one pixel unit, the common electrode forms a driving hollow pattern, a vertical projection of the pixel electrode on the common electrode covers the driving hollow pattern, and the vertical projection of the auxiliary electrode on the array substrate covers the driving hollow pattern.

6. The liquid crystal display panel according to claim 5 , wherein:
in each region corresponding to the one pixel unit, a shape of the pixel electrode is the same as a shape of the driving hollow pattern.

7. The liquid crystal display panel according to claim 5 , wherein:
in each region corresponding to the one pixel unit, the pixel electrode is a block electrode.

8. The liquid crystal display panel according to claim 1 , wherein:
the reference voltage is a common electrode voltage; and
the auxiliary electrode is electrically connected to the common electrode.

9. The liquid crystal display panel according to claim 2 , wherein:
the auxiliary electrode is integrated into the color film substrate.

10. The liquid crystal display panel according to claim 9 , wherein the color film substrate includes:
a third substrate as the base substrate;
a filter layer filling gaps inside the black matrix layer and extending to cover the black matrix layer; and
a planarization layer disposed on one side of the filter layer facing away the third substrate,
wherein the auxiliary electrode is sandwiched between the filter layer and the planarization layer, or disposed on one side of the planarization layer facing away the third substrate.

11. The liquid crystal display panel according to claim 9 , wherein the color film substrate includes:
a third substrate as the base substrate;
the filter layer filling gaps inside the black matrix layer and extending to cover the black matrix layer; and
the auxiliary electrode disposed on one side of the filter layer facing away the third substrate, wherein a surface of the auxiliary electrode facing towards the liquid crystal layer is a flat surface.

12. The liquid crystal display panel according to claim 10 , wherein:
a line width of the black matrix layer is less than or equal to 5 μm.

13. The liquid crystal display panel according to claim 11 , wherein:
a line width of the black matrix layer is less than or equal to 5 μm.

14. The liquid crystal display panel according to claim 1 , wherein:
a thickness of the liquid crystal layer is approximately 2 μm ˜2.5 μm, including endpoint values.

15. The liquid crystal display panel according to claim 1 , wherein:
liquid crystals in the liquid crystal layer are negative liquid crystals; and
the liquid crystal display panel is an in-plane switching panel.

16. A liquid crystal display device including a liquid crystal display panel, wherein the liquid crystal display panel comprises:
a first substrate;
a second substrate;
a liquid crystal layer sandwiched between the first substrate and the second substrate; and
an auxiliary electrode disposed on one side of the liquid crystal layer facing away the first substrate and coupled to a reference voltage,
wherein:
the first substrate includes a plurality of gate electrode lines, a plurality of data lines, the plurality of gate electrode lines intersecting the plurality of data lines to define a plurality of pixel units, a plurality of pixel electrodes and a plurality of common electrodes being insulated from the plurality of pixel electrodes,
the second substrate includes a base substrate and a black matrix layer disposed on one side of the base substrate facing towards the liquid crystal layer, and the auxiliary electrode is sandwiched between the black matrix layer and the base substrate,
in each region corresponding to one pixel unit, a pixel electrode and a common electrode are configured to form an electric field that drives the liquid crystal layer,
a vertical projection of the auxiliary electrode on the first substrate covers an area where the electric field is formed by the pixel electrode and the common electrode,
the auxiliary electrode is electrically connected to the common electrode through a golden ball, a vertical projection of the golden ball on the first substrate non-overlapping with the pixel electrode, and
a thickness of the liquid crystal layer is less than or equal to 3.2 μm.

17. The liquid crystal display device according to claim 16 , wherein:
the first substrate is an array substrate; and
the second substrate is a color film substrate.

18. The liquid crystal display device according to claim 17 , wherein:
the pixel electrode and the common electrode are disposed on a same layer; and
in each region corresponding to the one pixel units, a

Assignees

• Xiamen Tianma Micro Electronics Co Ltd
• Tianma Micro Electronics Co Ltd

Inventors

• Chen Binbin
• Liu Bozhi
• Liu Bingping

Classifications

• G02F1/134309

  characterised by their geometrical arrangement · CPC title

• G02F1/134363 Primary

  for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS] · CPC title

• G02F1/133512 Primary

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F2001/134381

  Physics · mapped topic

• G02F1/134381

  Hybrid switching mode, i.e. for applying an electric field with components parallel and orthogonal to the substrates · CPC title